Hourly Weather | Today Wednesday, May 20, 2026
Active Weather Warnings
Plainfield, New Jersey
7 PM
Stormy Weather
77°
Feels Like 79°
60
Humidity: 89%
UV Index: 0
Wind: 11 mph
8 PM
Stormy Weather
77°
Feels Like 77°
44
Humidity: 70%
UV Index: 0
Wind: 9 mph
9 PM
Stormy Weather
75°
Feels Like 72°
51
Humidity: 80%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Weather
72°
Feels Like 70°
47
Humidity: 78%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
70°
Feels Like 68°
34
Humidity: 71%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

7 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.44 µg/m³
  • PM10: 4.05 µg/m³
  • O3: 0.042 ppm
  • NO2: 3.9 ppb
  • SO2: 0.9 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.5 µg/m³
  • PM10: 4.09 µg/m³
  • O3: 0.037 ppm
  • NO2: 4.9 ppb
  • SO2: 1 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.65 µg/m³
  • PM10: 4.28 µg/m³
  • O3: 0.032 ppm
  • NO2: 5.3 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.92 µg/m³
  • PM10: 4.64 µg/m³
  • O3: 0.027 ppm
  • NO2: 5.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
21 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.11 µg/m³
  • PM10: 4.88 µg/m³
  • O3: 0.023 ppm
  • NO2: 6.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Weather Alerts and Warnings for Plainfield

Severe Immediate Observed

Severe Thunderstorm Warning

Severe Thunderstorm Warning issued May 20 at 6:07PM EDT until May 20 at 7:00PM EDT by NWS Upton NY
May 20, 6:07 PM May 20, 7:00 PM
SVROKX

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
Hudson County in northeastern New Jersey...
Union County in northeastern New Jersey...
Southern Essex County in northeastern New Jersey...
Richmond County in southeastern New York...
Kings County in southeastern New York...
New York (Manhattan) County in southeastern New York...

* Until 700 PM EDT.

* At 607 PM EDT, severe thunderstorms were located along a line
extending from near Peapack And Gladstone to Somerset to near
Plainsboro Center, moving east at 35 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to trees and power lines.

* Severe thunderstorms will be near...
Plainfield around 620 PM EDT.
Summit and Tottenville around 630 PM EDT.
Linden and Millburn around 635 PM EDT.
Elizabeth and Todt Hill around 640 PM EDT.
Port Richmond around 645 PM EDT.
Newark and Bayonne around 650 PM EDT.
Coney Island and Bay Ridge around 655 PM EDT.
+ Read More
For your protection move to an interior room on the lowest floor of a building.
Updated: May 20, 6:47 PM Source: NWS Alert
Severe Future Possible

Severe Thunderstorm Watch

Severe Thunderstorm Watch issued May 20 at 2:11PM EDT until May 20 at 9:00PM EDT by NWS Upton NY
May 20, 2:11 PM May 20, 9:00 PM
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
235 IN EFFECT UNTIL 9 PM EDT THIS EVENING FOR THE FOLLOWING AREAS

IN CONNECTICUT THIS WATCH INCLUDES 4 COUNTIES

IN SOUTHERN CONNECTICUT

FAIRFIELD MIDDLESEX NEW HAVEN
NEW LONDON

IN NEW JERSEY THIS WATCH INCLUDES 5 COUNTIES

IN NORTHEAST NEW JERSEY

BERGEN ESSEX HUDSON
PASSAIC UNION

IN NEW YORK THIS WATCH INCLUDES 11 COUNTIES

IN SOUTHEAST NEW YORK

BRONX KINGS (BROOKLYN) NASSAU
NEW YORK (MANHATTAN) ORANGE PUTNAM
QUEENS RICHMOND (STATEN ISLAND)
ROCKLAND SUFFOLK WESTCHESTER
Updated: May 20, 6:47 PM Source: NWS Alert
Moderate Expected Likely

Heat Advisory

Heat Advisory issued May 20 at 2:17AM EDT until May 20 at 8:00PM EDT by NWS Upton NY
May 20, 2:17 AM May 20, 8:00 PM
WHAT: Heat index values in the middle 90s expected.

WHERE: Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern
Union, Hudson, Western Bergen, Western Essex, Western Passaic, and
Western Union Counties.

WHEN: Until 8 PM EDT this evening.

IMPACTS: Hot temperatures may cause heat illnesses.
+ Read More
A Heat Advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time. Seniors and those with chronic health problems or mental health conditions are at an increased risk. Homes without air conditioning can be much hotter than outdoor temperatures. Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don't have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot. Check on vulnerable friends, family members and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1.
Updated: May 20, 6:47 PM Source: NWS Alert